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Finding the Third Proportional to 857.67 and 935.30

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Solution

The third proportional to 857.67 and 935.30 is: 1,019.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.67 : 935.30 = 935.30 : x
  2. Step 2: Convert to fraction form
    857.67/935.30 = 935.30/x
  3. Step 3: Cross multiply
    857.67x = 935.30 × 935.30
  4. Step 4: Simplify right side
    857.67x = 874,780.24
  5. Step 5: Solve for x
    x = 874,780.24/857.67
  6. Step 6: Final answer
    x = 1,019.95

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.